potypes of _L. i. minor_ of comparable age. It is on this
basis of wider rostrum that we refer the five specimens from Tlapa to
_Liomys i. minor_ which Hooper and Handley (_op. cit._:13) described as
differing from the geographically adjacent _L. i. irroratus_ in "short
and strongly tapered rostrum." We would add that we have not
independently verified this difference between _L. i. minor_ and _L. i.
irroratus_ for want of specimens of _L. i. irroratus_ comparable in age
to the five individuals from Tlapa.

The map of Hooper and Handley (_loc. cit._) inferentially excludes
Tlalixtaquilla, Guerrero, from the geographic range of _L. i. minor_
(and places Tlalixtaquilla within the range of _L. i. irroratus_)
although Goldman (_op. cit._:56) previously had identified specimens
from this place as _L. i. minor_. Our examination of the two immature
specimens (70227 and 70230 BS) from Tlalixtaquilla reveals that they
closely resemble the holotype of _L. i. minor_ and leads to the
conclusion that they are _Liomys irroratus minor_.

~Perognathus amplus pergracilis~ Goldman

When Bole (Sci. Publ. Cleveland Mus. Nat. Hist., 5(2):6, December 4,
1937) named and described _Perognathus longimembris salinensis_, he
listed as comparative material of _P. l. bangsi_, a specimen in the
Museum of Comparative Zoology from Parker, Yuma Co., Arizona. There was
some reason to doubt the identification of the specimen since it is the
only record of occurrence of the subspecies from east of the Colorado
River. There is no specimen of _Perognathus longimembris_ from Arizona
in the Museum of Comparative Zoology. There is one specimen of pocket
mouse (18213, a skin only) from 30 miles east of Parker. We think that
this is the specimen seen by Bole because at one time according to the
label, it had been identified as _Perognathus panamintinus_ [=
_longimembris_] _bangsi_. If the identification of this skin-only had
been made by means of Osgood's key (N. Amer. Fauna, 18:14-15, September
20, 1900), the animal would have "keyed out" to _P. longimembris_
because the total length is recorded on the label as 130. Seth B. Benson
has subsequently examined the specimen. The label now bears in
handwriting the name of _P. amplus pergracilis_ and is followed by
Benson's initials as the identifier. Although we lack adequate
comparative material, we consider the specimen to be _P. amplus
pergracilis_ Goldman, because the skin answers well to the description
of